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Tajkarimi M, Shojaee Aliabadi F, Salah Nejad M, Pursoltani H, Motallebi AA,
Mahdavi H.
Seasonal study of aflatoxin M1 contamination in milk in
five regions in Iran.
Int J Food Microbiol. 2007 May 30;116(3):346-9. Epub 2007 Mar 1.
Iran Dairy Industries Company(Pegah), Tehran, Iran.
mtajkarimi@ucdavies.edu
Between April 2003 and February 2004, 98 samples of raw milk were obtained
from milk tanks in one dairy plant in each of five regions in Iran. These were
chosen with mean distances apart of 400 km, whereby they have different
ecologies (temperature, relative humidity, etc.) and different agricultural
products were used for animal feeding. Samples (24-25 per season) were
laboratory heat treated and were analyzed for aflatoxin M1 with a validated High
Performance Liquid Chromatography (HPLC) system. The overall mean of all samples
was 0.041-0.065 microg/L (95% confidence) and the adjusted mean based on
statistical modification was 0.039 ppb: 61 samples had 0.000-0.050 microg/L, 29
samples were contaminated with 0.05-0.10 microg/L, and the remaining 8 samples
had 0.1-0.39 microg/L. All of the samples were lower than Codex Alimentarius and
FDA standards (0.5 microg/L). Levels of aflatoxin M1 were higher in winter and
spring than in summer and autumn, but the differences were not statistically
significant (P>0.07). However, the level of aflatoxin in milk from one region
(Hamedan) was significantly lower (P<0.05) than in those of the other regions
(Gorgan, Rasht, Shiraz, Tehran).
PMID: 17391793
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